:root {
  --ink: #1a1a1a;
  --line: #1a1a1a;
  --paper: #fdfdfc;
  --muted: #555;
  --card-radius: 22px 18px 24px 16px / 16px 24px 18px 22px;
}

* { box-sizing: border-box; }

img { max-width: 100%; height: auto; }

html { scroll-behavior: smooth; }
body { overflow-x: hidden; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Caveat", "Segoe Print", cursive;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.skip {
  position: absolute;
  left: -9999px;
}
.skip:focus {
  left: 16px; top: 16px;
  background: #fff; padding: 8px 14px;
  border: 2px solid var(--ink); z-index: 100;
  font-family: system-ui, sans-serif;
}

/* ---------- Header ---------- */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 26px 48px 10px;
  max-width: 1500px;
  margin: 0 auto;
  flex-wrap: wrap;
}

.brand {
  font-family: "Dancing Script", cursive;
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
}

.nav {
  display: flex;
  gap: clamp(16px, 2.4vw, 40px);
  align-items: center;
}
.nav a {
  font-family: system-ui, "Helvetica Neue", Arial, sans-serif;
  font-size: 15px;
  letter-spacing: 1.5px;
  font-weight: 500;
  color: var(--ink);
  text-decoration: none;
  padding-bottom: 3px;
  border-bottom: 2px solid transparent;
  transition: border-color .15s ease, opacity .15s ease;
}
.nav a:hover { opacity: .6; }
.nav a.active { border-bottom-color: var(--ink); }

/* ---------- Layout ---------- */
.layout {
  display: grid;
  grid-template-columns: minmax(300px, 360px) minmax(360px, 1fr) minmax(340px, 420px);
  gap: clamp(20px, 3vw, 48px);
  align-items: start;
  max-width: 1500px;
  width: 100%;
  /* margin auto (not "0 auto") + flex body = vertically centered on tall monitors */
  margin: auto;
  padding: 10px 48px 60px;
}

.col { display: flex; flex-direction: column; gap: clamp(20px, 2.6vw, 36px); min-width: 0; }
.col-center { align-items: center; }

/* nudge the left column (talk + article) down so it sits below the header
   with breathing room, matching the reference layout */
.col-left { margin-top: 40px; }

/* ---------- Generic card ---------- */
.card {
  position: relative;
  display: block;
  background: #fff;
  border: 2.5px solid var(--line);
  border-radius: var(--card-radius);
  color: var(--ink);
  text-decoration: none;
  overflow: hidden;
  box-shadow: 2px 3px 0 rgba(0,0,0,.06);
  transition: transform .18s ease, box-shadow .18s ease;
  min-width: 0;
}
.card:hover {
  transform: translateY(-3px) rotate(-.3deg);
  box-shadow: 4px 7px 0 rgba(0,0,0,.10);
}

.arrow {
  position: absolute;
  right: 18px;
  bottom: 12px;
  font-size: 26px;
  line-height: 1;
  font-family: "Caveat", cursive;
}

.eyebrow {
  font-family: system-ui, sans-serif;
  font-size: 12px;
  letter-spacing: 2px;
  color: var(--muted);
  margin: 0 0 8px;
}
.eyebrow.underlined {
  display: inline-block;
  border-bottom: 1.5px solid var(--ink);
  padding-bottom: 4px;
  color: var(--ink);
}

/* ---------- Talk card ---------- */
.card-talk { padding: 10px 10px 34px; }
.card-talk img {
  width: 100%;
  display: block;
  border-radius: 8px;
}

/* ---------- News card ---------- */
.card-news { padding: 20px 22px 40px; }
.news-title {
  font-size: clamp(26px, 2.4vw, 34px);
  font-weight: 700;
  line-height: 1.05;
  margin: 0 0 16px;
}
.news-thumb {
  width: 100%;
  display: block;
  border: 2px solid var(--line);
  border-radius: 6px;
}
.scribble-lines {
  display: flex;
  flex-direction: column;
  gap: 11px;
  margin-top: 18px;
}
.scribble-lines span {
  height: 1.5px;
  background: #cfcfcf;
  border-radius: 2px;
}
.scribble-lines span:nth-child(1){ width: 100%; }
.scribble-lines span:nth-child(2){ width: 100%; }
.scribble-lines span:nth-child(3){ width: 92%; }
.scribble-lines span:nth-child(4){ width: 70%; }

/* ---------- Hero ---------- */
.hero-img {
  width: 100%;
  max-width: 460px;
  display: block;
}
.intro {
  font-size: clamp(26px, 2.5vw, 36px);
  font-weight: 500;
  text-align: center;
  line-height: 1.25;
  max-width: 440px;
  margin: 6px auto 0;
}

/* ---------- Right top row ---------- */
.right-top {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(16px, 1.6vw, 26px);
  min-width: 0;
}

/* X card */
.card-x {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 30px 14px;
  aspect-ratio: 1 / 1;
}
.x-logo { width: 64px; height: 64px; fill: var(--ink); }
.handle {
  font-size: 24px;
  font-weight: 600;
}

/* TEDx Best of Humanity */
.card-tedx2 {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  gap: 10px;
  padding: 22px 22px 40px;
  aspect-ratio: 1 / 1;
}
.tedx-logo {
  font-family: system-ui, Arial, sans-serif;
  font-weight: 800;
  font-size: 40px;
  letter-spacing: -1px;
  line-height: 1;
}
.tedx-logo sup { font-size: 20px; }
.tedx-sub {
  font-size: 27px;
  font-weight: 600;
  line-height: 1.05;
}

/* Research card */
.card-research {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: stretch;
  gap: 10px;
  padding: 22px 0 22px 24px;
  min-height: 230px;
}
.research-text { display: flex; flex-direction: column; gap: 14px; }
.research-title {
  font-size: clamp(30px, 2.6vw, 40px);
  font-weight: 700;
  line-height: 1.05;
  margin: 0;
}
.robot {
  height: 100%;
  width: auto;
  max-height: 250px;
  object-fit: contain;
  align-self: end;
  justify-self: end;
}

/* Cornell card */
.card-cornell:hover {
  transform: none;
  box-shadow: 2px 3px 0 rgba(0,0,0,.06);
  cursor: default;
}
.card-cornell {
  display: flex;
  align-items: center;
  gap: 22px;
  padding: 22px 26px;
}
.cornell-seal { width: 92px; height: auto; flex: none; }
.cornell-text { display: flex; flex-direction: column; gap: 6px; }
.cornell-name { font-size: 30px; font-weight: 600; }
.cornell-major { font-size: 22px; color: var(--muted); }

/* ---------- Derivative card ---------- */
.card-derivative {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 26px 40px;
}
.derivative-row {
  display: flex;
  align-items: center;
  gap: 22px;
}
.derivative-d {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 60px;
  line-height: 1;
}
.derivative-text { display: flex; flex-direction: column; gap: 4px; }
.derivative-name { font-size: 30px; font-weight: 600; }
.derivative-sub { font-size: 21px; color: var(--muted); line-height: 1.15; }

/* ---------- Responsive ---------- */
@media (max-width: 1160px) {
  .layout {
    grid-template-columns: 1fr 1fr;
    padding: 10px 28px 50px;
  }
  .col-center { grid-column: 1 / -1; order: -1; }
}

@media (max-width: 680px) {
  .site-header { padding: 20px 22px 8px; justify-content: center; text-align: center; }
  .nav { flex-wrap: wrap; justify-content: center; }
  .layout {
    grid-template-columns: 1fr;
    padding: 10px 20px 48px;
  }
  .col-center { order: -1; }
  .col-left { margin-top: 0; }
  .intro {
    font-size: clamp(20px, 5.4vw, 28px);
    max-width: 86vw;
    overflow-wrap: break-word;
  }
}